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include/input.h
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/* * Keyboard input helper functions (too small to be called a layer) * * Copyright (c) 2011 The Chromium OS Authors. |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ #ifndef _INPUT_H #define _INPUT_H enum { INPUT_MAX_MODIFIERS = 4, INPUT_BUFFER_LEN = 16, }; enum { /* Keyboard LEDs */ INPUT_LED_SCROLL = 1 << 0, INPUT_LED_CAPS = 1 << 1, INPUT_LED_NUM = 1 << 2, }; /* * This table translates key codes to ASCII. Most of the entries are ASCII * codes, but entries after KEY_FIRST_MOD indicate that this key is a * modifier key, like shift, ctrl. KEY_FIRST_MOD + MOD_SHIFT is the shift * key, for example. */ struct input_key_xlate { /* keycode of the modifiers which select this table, -1 if none */ int left_keycode; int right_keycode; const uchar *xlate; /* keycode to ASCII table */ int num_entries; /* number of entries in this table */ }; struct input_config { uchar fifo[INPUT_BUFFER_LEN]; int fifo_in, fifo_out; /* Which modifiers are active (1 bit for each MOD_... value) */ uchar modifiers; uchar flags; /* active state keys (FLAGS_...) */ uchar leds; /* active LEDS (INPUT_LED_...) */ uchar num_tables; /* number of modifier tables */ int prev_keycodes[INPUT_BUFFER_LEN]; /* keys held last time */ int num_prev_keycodes; /* number of prev keys */ struct input_key_xlate table[INPUT_MAX_MODIFIERS]; /** * Function the input helper calls to scan the keyboard * * @param config Input state * @return 0 if no keys read, otherwise number of keys read, or 1 if * unknown */ int (*read_keys)(struct input_config *config); unsigned int next_repeat_ms; /* Next time we repeat a key */ unsigned int repeat_delay_ms; /* Time before autorepeat starts */ unsigned int repeat_rate_ms; /* Autorepeat rate in ms */ }; struct stdio_dev; /** * Convert a list of key codes into ASCII and send them * * @param config Input state * @param keycode List of key codes to examine * @param num_keycodes Number of key codes |
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* @return number of ascii characters sent, or 0 if none, or -1 for an * internal error |
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*/ int input_send_keycodes(struct input_config *config, int keycode[], int count); /** * Add a new key translation table to the input * * @param config Input state * @param left_keycode Key to hold to get into this table * @param right_keycode Another key to hold to get into this table * @param xlate Conversion table from key codes to ASCII * @param num_entries Number of entries in xlate table */ int input_add_table(struct input_config *config, int left_keycode, int right_keycode, const uchar *xlate, int num_entries); /** * Test if keys are available to be read * * @param config Input state * @return 0 if no keys available, 1 if keys are available */ int input_tstc(struct input_config *config); /** * Read a key * * TODO: U-Boot wants 0 for no key, but Ctrl-@ is a valid key... * * @param config Input state * @return key, or 0 if no key, or -1 if error */ int input_getc(struct input_config *config); /** * Register a new device with stdio and switch to it if wanted * * @param dev Pointer to device * @return 0 if ok, -1 on error */ int input_stdio_register(struct stdio_dev *dev); /** |
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* Set up the keyboard autorepeat delays * * @param repeat_delay_ms Delay before key auto-repeat starts (in ms) * @param repeat_rate_ms Delay between successive key repeats (in ms) */ void input_set_delays(struct input_config *config, int repeat_delay_ms, int repeat_rate_ms); /** |
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* Set up the input handler with basic key maps. * * @param config Input state * @param leds Initial LED value (INPUT_LED_ mask), 0 suggested |
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* @return 0 if ok, -1 on error */ |
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int input_init(struct input_config *config, int leds); |
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#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE extern int overwrite_console(void); #define OVERWRITE_CONSOLE overwrite_console() #else #define OVERWRITE_CONSOLE 0 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */ #endif |